Use of heat pipe-block rubble slope protection cooling heat insulating composite roadbed in broad width road

Abstract

The invention discloses the application of a thermal pipe-crushed stone protection slop composite roadbed with the functions of temperature reduction and thermal insulation in a broad width high-grade road. The composite roadbed comprises sealed L-shaped thermal pipes, crushed stone protection slops, insulating layers and roadbed filling, wherein the crushed stone protection slops are laid on side slopes on both sides of the roadbed until reaching a natural earth's surface; the L-shaped thermal pipes are embedded in the roadbed filling, and ammonia or nitrogen is used as working media in the pipes; and the insulating layers are embedded in the underground roadbed filling. By utilizing the changes of angles of the condensation segments and the evaporation segments of the L-shaped thermal pipes in the roadbed, the composite roadbed lowers the temperature of soil bodies under the center of the roadbed; and by combining the advantages of the crushed stone protection slops and the thermal insulating layers, the composite roadbed increases the cold energy suction volume in a cold season and effectively controls the heat absorption capacity in a warm season, thereby realizing the temperature reduction of the underlying soil bodies of the broad width high-grade roads, balancing a temperature field, increasing the upper limit of frozen soil, and meeting the special requirement of roadbed stability of perennial high temperature permafrost regions.

Description

technical field [0001] The invention relates to a road structure form, especially a roadbed structure form applied to wide-width high-grade roads in high-temperature permafrost regions, which can effectively reduce the temperature of the frozen soil at the lower part of the roadbed of high-grade roads, raise the upper limit of frozen soil, and ensure Long-term stability of permafrost subgrades. Background technique [0002] Frozen soil refers to soil and rocks with negative temperature and ice, and is mainly divided into permafrost and seasonal frozen soil according to the survival time. my country's permafrost area accounts for about 22.4% of the country's land area, making it the third largest country in the world with permafrost. Due to the existence of ice and unfrozen water in frozen soil, its properties are extremely complex and sensitive to temperature. Due to road construction and global warming, the temperature of permafrost will rise, which will bring thawing dam...

AI Technical Summary

Problems solved by technology

However, under the conditions of global warming today, in permafrost regions, especially in high-temperature permafrost regions, for high-grade roads with higher road surface temperature and larger roadbed width, more heat is stored in the roadbed , the cooling efficiency of the above engineering measures will not be enough to reduce the temperature of the wide high-grade road subgrade and the underlying soil. If the above engineering measures are applied to wide high-grade roads, the stability of the subgrade will be difficult to be guaranteed

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